1. The two major layers of the skin are:
a. Epidermis and subdermis
c. Dermis and subcutaneous
d. Dermal and fatty layer
ANSWER: B The skin is classically subdivided into two major components, the epidermis and the dermis.
2. How frequently does the epidermis typically regenerate?
ANSWER: B The epidermis is a thin outer layer of skin. It is an avascular layer that regenerates itself every 4 to 6 weeks.
3. Up to 75% of the skin's total dry weight is composed of
ANSWER: B Collagen is the most abundant structural protein in the body and accounts for upward to 75% of the skin's total dry weight.
4. The outermost layer of the epidermis is termed the stratum
ANSWER: A The outermost layer of the epidermis is the stratum corneum and is composed of dead keratinocytes.
1. Which of the following is the correct sequential order of the phases of healing?
a. Remodeling, inflammation, hemostasis, and repair
b. Inflammation, hemostasis, proliferation, and maturation
c. Hemostasis, inflammation, repair, and remodeling
d. Inflammation, maturation, proliferation, and hemostasis
ANSWER: C Each phase of wound healing serves as a prerequisite for the following stage. During hemostasis, bleeding ceases and a fibrin clot develops to serve as a provisional matrix for infiltrating inflammatory and repair cells. Inflammation is a necessary next step to clear bacteria and debris before repair cells begin to proliferate in the wound bed. The proliferative (repair) phase follows inflammation with the capacity to fill in the defect with neovascular structures, fibroblasts, and ...